Changed the regular expression in ADB.prototype.waitForActivity to make
the period optional at the begining of the activity.  At least for API 17 I
don't see it.  Here is the line for mFocusedApp for my app:
mFocusedApp=AppWindowToken{b52c36d0 token=Token{b524e338 ActivityRecord{b528ae18 u0 com.xxxxx.android.root/com.xxxxx.android.activity.LoginScreenActivity}}}

Removed backup file and added ignore
Merge pull request #339 from bootstraponline/xuru

Squashed #335
add refresh() and a weak test for it